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Show QR code when clicking on profile image

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This commit is contained in:
Christian Basler
2017-04-18 16:38:45 +02:00
parent 26fca259bc
commit 911dfa7a27
3 changed files with 112 additions and 59 deletions
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59
app/src/main/java/ch/dissem/apps/abit/util/Drawables.java
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@ -19,19 +19,40 @@ package ch.dissem.apps.abit.util;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.util.Base64;
import android.view.Menu;
import android.view.MenuItem;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.mikepenz.iconics.IconicsDrawable;
import com.mikepenz.iconics.typeface.IIcon;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import ch.dissem.apps.abit.Identicon;
import ch.dissem.apps.abit.R;
import ch.dissem.bitmessage.entity.BitmessageAddress;
import ch.dissem.bitmessage.exception.ApplicationException;
import static android.graphics.Color.BLACK;
import static android.graphics.Color.WHITE;
import static android.util.Base64.URL_SAFE;
/**
* Some helper methods to work with drawables.
*/
public class Drawables {
private static final Logger LOG = LoggerFactory.getLogger(Drawables.class);
private static final int QR_CODE_SIZE = 350;
public static MenuItem addIcon(Context ctx, Menu menu, int menuItem, IIcon icon) {
MenuItem item = menu.findItem(menuItem);
item.setIcon(new IconicsDrawable(ctx, icon).colorRes(R.color.colorPrimaryDarkText).actionBar());
@ -49,4 +70,42 @@ public class Drawables {
identicon.draw(canvas);
return bitmap;
}
public static Bitmap qrCode(BitmessageAddress address) {
StringBuilder link = new StringBuilder("bitmessage:");
link.append(address.getAddress());
if (address.getAlias() != null) {
link.append("?label=").append(address.getAlias());
}
if (address.getPubkey() != null) {
link.append(address.getAlias() == null ? '?' : '&');
ByteArrayOutputStream pubkey = new ByteArrayOutputStream();
try {
address.getPubkey().writeUnencrypted(pubkey);
} catch (IOException e) {
throw new ApplicationException(e);
}
link.append("pubkey=").append(Base64.encodeToString(pubkey.toByteArray(), URL_SAFE));
}
BitMatrix result;
try {
result = new MultiFormatWriter().encode(link.toString(),
BarcodeFormat.QR_CODE, QR_CODE_SIZE, QR_CODE_SIZE, null);
} catch (WriterException e) {
LOG.error(e.getMessage(), e);
return null;
}
int w = result.getWidth();
int h = result.getHeight();
int[] pixels = new int[w * h];
for (int y = 0; y < h; y++) {
int offset = y * w;
for (int x = 0; x < w; x++) {
pixels[offset + x] = result.get(x, y) ? BLACK : WHITE;
}
}
Bitmap bitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
bitmap.setPixels(pixels, 0, QR_CODE_SIZE, 0, 0, w, h);
return bitmap;
}
}